ok, soo I work full time as an Industrial mechanic, and I deal alot with metals and heat and I know how things work and react and such, and my company has a mechinist who can make ANYTHING out of metal, he made my friend solid motor mounts for his 99 2.0 supercharged jetta, well we were outside at lunch time enjoying the weather, talking about my car, and when I do my pulley swap I was going to have my machinest here just take off the stock pulley and the press the new one with the pulley hub on, and we were talking about it and he said why? I said why what?, he siad to do that you have to remove the s/c and I said yeah that the only way I know of to get that thing on and he told me to pull it with a gear puller (we have one small even to fit in there and pull the pulley with the supercharger on the car) and heat shrink the pulley on there, I was like WOAH!! we do that all the time here with conveyor rollers that have bad shafts, we will machine them and then resleeve them, and he think we can just heat the pulley hub enough, to get it to expand to the size we need and just slide it on there let it cool and its just as goos as pressing it on,

I know it will work, Ive done it before and dont know why I NEVER thought of it, I feel dumb, lol he says ins better than welding in most cases too, but I think Im going to do it this way,

let me here all opinions and comments on this, beucase I feel like I might have just discovered something big, lol like everyone has been pulling there s/cs to put the pulley hubs on and I can do it without removing it, I think this is aweosme!

ok let me here it! anyone try this. Iwant good and bad

 

lol i would just pull the sc off its 4 bolts and about 4 clips...

 

lol, but this is eaiser, and less time

 

There's not enough room for the puller an the wrench both to fit to do this. This is why everyone pulls the charger off. Yes, this is a good idea on a charger facing toward the radiator, it's done everyday. For this application it is not the best way.

 

it only takes a few minutes to pull the charger off......dont be lazy! lol

 

i would do it , on my old gtp i payed someone like 100 dollars the first time i did my pulley the second time some guy with a tow truck was able to get the 3.4 press pulley off and put a 3.25 modular pulley system on in about 10 mins , the same way your talking , yeah theres a little more space on a grand prix , but what your talking about should work especially heating the hub up enough to where it slides on ive seen it first hand

 

i don't think it is a good idea to heat up the pulley to put it on. I actually think it is a BAD idea. by heating it can lose its round, become brittle, lose structural integrity, and eventually cause failure to something. weather it be the pulley, the SC or one of the other things driven by the belt bacause of it.


Klif notes. Bad Idea.

 

as long as its done right none of that will happen, I do it at work ALL the time with factory machinery that is ranharder in a day than my car will in its life time

 

Its much simpler to use a puller. I can have the pulley off in a few minutes....its putting it on that kicks my ass (two installs I've put the hub on backwards and had to remove it) Heat works...its not a preferred method.

 

I can get the pulley off while its in the car, I know I can, and heat the hub and put it on, no force too put it on, when you heat it up it expands just a enough to slide on and let it cool and its better than welding, Ive done it and my machniist swears we can get it dont, I think Im going to try it,

 

good luck....hope it works, I would remove the supercharger though, it is extremelly easy, had mine off a few times in a matter of 20mins or less... also, do you have a press? you can press the pulley off, heating it up to put it back on is a good idea too, dont see how you would have any problems with that... let me know how it goes , I am intrested in doing the same in the future here.....

 

Another possible issue is how much heat will be transferred to the shaft seal from the hot hub through the shaft? I'm not sure of the specific heat of either material (which hub are you using?) but if the hub has much mass relative to the shaft quite a bit of heat will be transferred through conduction...just a thought.